Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2

Soviet Union of 1923-40

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Start price: $500

Buyer's premium:

1927, surcharge ”8 kop” on 7k commemorative stamps, complete set of six, unfolded blocks of 4, nice and fresh, full OG, NH, VF, Est. $800-$1,000,Scott #353-58